CVE-2026-74864CWE-639

CVE-2026-74864

published September 30, 2026

CVSS
9.3
EPSS
0%
Percentile
33.8
In the wild
Unconfirmed
What it is

sogo_yhn configures SOGo with a parameter that forces the request with HTTP header "x-webobjects-remote-user" to be treated as sent by a verified user without performing password validation. Since Nginx does not strip this header, any client can supply it arbitrarily and gain access as any user, including a privileged user, without providing a password.

This issue was fixed in version 5.8.0~ynh9.

The record
Technical detail
CVSS
9.3 · NONE
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00406 · 33.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-09-30T17:17Z
References (2)
https://cert.pl/en/posts/2026/09/CVE-2026-74864 · [email protected]https://forum.yunohost.org/t/sogo-critical-vulnerability-fixed-in-5-8-0-ynh9/42699 · [email protected]
EPSS history
Timeline
  • 02 OCT 03:46Z
    EPSS moved — → 1%
    epss
  • 30 SEP 12:02Z
    Authentication Bypass in sogo_yhn
    cvelistv5